LONDON — Facebook and Instagram owner Meta said Friday that it will stop all political advertising in the European Union by October, blaming legal uncertainty over new rules designed to increase transparency in election campaigns.

Meta isn’t the only company objecting to the incoming EU rule changes, which are also set to come into effect in October. Last year, Google stopped serving paid-for political ads in the EU, including on YouTube, and the company ultimately avoided fines for its allegedly "abusive" online advertising practices in 2019.

Meta said political advertising would end in October, citing a forthcoming E.U. regulation that it said presented “unworkable requirements.”